Fix focus tracker sometimes not being created properly for webview Editors

Fixes #46974

src/vs/workbench/parts/webview/electron-browser/webviewEditor.ts

@@ -185,17 +185,15 @@ export class WebviewEditor extends BaseWebviewEditor {
 		}
 
 		this.webviewContent = input.container;
+
+		this.trackFocus();
+
 		const existing = input.webview;
 		if (existing) {
 			this._webview = existing;
 			return existing;
 		}
 
-		this._webviewFocusTracker = DOM.trackFocus(this.webviewContent);
-		this._webviewFocusListenerDisposable = this._webviewFocusTracker.onDidFocus(() => {
-			this._onDidFocusWebview.fire();
-		});
-
 		if (input.options.enableFindWidget) {
 			this._contextKeyService = this._contextKeyService.createScoped(this.webviewContent);
 			this.contextKey = KEYBINDING_CONTEXT_WEBVIEWEDITOR_FOCUS.bindTo(this._contextKeyService);
@@ -226,5 +224,19 @@ export class WebviewEditor extends BaseWebviewEditor {
 		this.doUpdateContainer();
 		return this._webview;
 	}
+
+	private trackFocus() {
+		if (this._webviewFocusTracker) {
+			this._webviewFocusTracker.dispose();
+		}
+		if (this._webviewFocusListenerDisposable) {
+			this._webviewFocusListenerDisposable.dispose();
+		}
+
+		this._webviewFocusTracker = DOM.trackFocus(this.webviewContent);
+		this._webviewFocusListenerDisposable = this._webviewFocusTracker.onDidFocus(() => {
+			this._onDidFocusWebview.fire();
+		});
+	}
 }